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docs(TODO.impl/10): engram verdict — FLAT, 4.6679 #100

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ronaldtse merged 1 commit into from
Sep 29, 2026
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docs(TODO.impl/10): engram verdict — FLAT, 4.6679 #100

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18 changes: 18 additions & 0 deletions TODO.impl/10-engram-lexical-memory.md
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Expand Up @@ -70,3 +70,21 @@ the tiny T5 fixture, exported, loaded in ORT, decode-health smoke.
- [x] Gate opened (02 and 04 closed negative)
- [x] Module + probe landed
- [ ] Run (owner-gated)

## Verdict (2026-09-29): FLAT — 4.6679, not separated from 2.1

Full-set n=1200, canonical labels (sha e70ce991), with-table eval via
load_student_with_engram (the vanilla loader drops the memory — PKM
lesson; first eval scored the control). Delta vs 2.1 (+0.10pp) inside
the drift band, paired bootstrap does not separate. The encoder
absorbed the capacity without converting it to frontier movement on
the news/wiki residual. The architecture ledger closes complete:
depth ✗✗, memory ✗ flat, on-policy ✗, routing ✗, soup ✗. 2.1
(4.5701) stands. Remaining levers: recipe (r8) and release (static).

## Status update

- [x] Run (launched under the standing directive, resumed 7× through
preemptions; two eval traps caught: dropped-table load, wrong
harness, tied-alias strictness — all fixed in PR #222)
- [x] Verdict recorded in RESULTS.md (PR #223)
2 changes: 1 addition & 1 deletion TODO.impl/README.md
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Expand Up @@ -23,7 +23,7 @@ Priorities:
| 07 | diacritization-depth-knob.md | depth-conditioned vocalization | P3 | product decision |
| 08 | golden-closeout.md | golden test PR, paper-c wording, release README note | P0 | closed 2026-09-12 (PR #211 merged) |
| 09 | doc-corrections.md | Engram mechanism fix, mHC single-pass note | P2 | landed in PR #95 |
| 10 | engram-lexical-memory.md | hashed n-gram memory module | P3 | gate opened; module + export probe landed (PR #215); run owner-gated |
| 10 | engram-lexical-memory.md | hashed n-gram memory module | P3 | closed FLAT 2026-09-29: 4.6679, not separated |
| 11 | static-int8-framing.md | static scales as the framing fix | P0 | framing closed (node-kernel); speed branch POSITIVE (4.6241, +8%) |

Standing rules that apply to every item: full-set measurement or no
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